package com.sen.gulimall.auth.controller;

import com.alibaba.fastjson.TypeReference;
import com.google.common.collect.Maps;
import com.sen.common.constant.AuthServerConstant;
import com.sen.common.exception.BizCodeEnum;
import com.sen.common.utils.R;
import com.sen.common.vo.MemberRespVo;
import com.sen.gulimall.auth.feign.MemberFeignService;
import com.sen.gulimall.auth.feign.ThridPartyFeignService;
import com.sen.gulimall.auth.vo.UserLoginVo;
import com.sen.gulimall.auth.vo.UserRegistVo;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * @author Kisen
 * @email liuqs@jaid.cn
 * @date 2022/9/24 21:32
 * @detail
 */
@Slf4j
@Controller
public class LoginController {

    @Autowired
    private ThridPartyFeignService thridPartyFeignService;

    @Autowired
    private StringRedisTemplate redisTemplate;

    @Autowired
    private MemberFeignService memberFeignService;

    /**
     * 发送一个请求直接跳转到一个页面
     * SpringMVC viewcontroller: 将请求和页面映射过来
     */

    @ResponseBody
    @GetMapping("sms/sendcode")
    public R sendCode(@RequestParam("phone") String phone) {

        //TODO  1、接口防刷

        String redisCode = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone);
        if (StringUtils.isNotEmpty(redisCode)) {
            long l = Long.parseLong(redisCode.split("_")[1]);
            if (System.currentTimeMillis() - l < 60000) {
                //60秒内不能再发
                return R.error(BizCodeEnum.SMS_CODE_EXCEPTION.getCode(), BizCodeEnum.SMS_CODE_EXCEPTION.getMsg());
            }
        }

        //2、验证码的再次校验。redis。存key-phone,value-code    sms:code:19842362658 -> 456789
        String code = String.valueOf((int) ((Math.random() * 9 + 1) * Math.pow(10, 5)));
        String cacheCode = code + "_" + System.currentTimeMillis();
        //redis缓存验证码，防止同一个phone在60秒内再次发送验证码
        redisTemplate.opsForValue().set(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone, cacheCode, 5, TimeUnit.MINUTES);

        log.info(cacheCode);
        thridPartyFeignService.sendCode(phone, code);
        return R.ok();
    }

    /**
     * TODO 重定向携带数据，利用session原理。将数据放在session中。
     * 只要跳到下一个页面取出这个数据之后，session里面的数据就会删掉
     * <p>
     * TODO 分布式下session的问题
     * RedirectAttributes redirectAttributes：模拟重定向携带数据
     *
     * @param vo
     * @param result
     * @param redirectAttributes
     * @return
     */
    @PostMapping("regist")
    public String regist(@Validated UserRegistVo vo, BindingResult result,
                         RedirectAttributes redirectAttributes) {
        if (result.hasErrors()) {
            Map<String, String> errors = result.getFieldErrors().stream().collect(Collectors.toMap(FieldError::getField, FieldError::getDefaultMessage));

//            model.addAttribute("errors", errors);
            redirectAttributes.addFlashAttribute("errors", errors);
            //Request method 'POST' not supported
            //用户注册->/regist[post]------>转发/reg.html （路径映射默认都是get方式访问的。）

            //校验出错，转发到注册页
            return "redirect:http://auth.gulimall.com/reg.html";
        }

        //校验验证码
        String code = vo.getCode();
        String phone = vo.getPhone();

        String cacheCode = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone);
        if (StringUtils.isNotEmpty(cacheCode) && StringUtils.equals(code, cacheCode.split("_")[0])) {
            //删除验证码；令牌机制
            redisTemplate.delete(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone);
            //验证码通过。真正注册，调用远程服务进行注册
            R r = memberFeignService.regist(vo);
            if (r.getCode() == 0) {
                //注册成功回到首页，回到登录页
                return "redirect:http://auth.gulimall.com/login.html";
            }
            Map<String, String> errors = Maps.newHashMap();
            errors.put("msg", r.getData("msg", new TypeReference<String>() {
            }));
            redirectAttributes.addFlashAttribute("errors", errors);
            return "redirect:http://auth.gulimall.com/reg.html";
        }

        Map<String, String> errors = Maps.newHashMap();
        errors.put("code", "验证码错误");
        redirectAttributes.addFlashAttribute("errors", errors);
        return "redirect:http://auth.gulimall.com/reg.html";
    }

    @GetMapping("/login.html")
    public String loginPage(HttpSession session) {
        Object attribute = session.getAttribute(AuthServerConstant.LOGIN_USER);
        if (attribute != null) {
            return "redirect:http://gulimall.com";
        }

        return "login";
    }

    @PostMapping("/login")
    public String login(UserLoginVo vo, RedirectAttributes redirectAttributes,
                        HttpSession session) {

        //远程登录
        R login = memberFeignService.login(vo);
        if (login.getCode() == 0) {
            MemberRespVo data = login.getData(new TypeReference<MemberRespVo>() {
            });
            session.setAttribute(AuthServerConstant.LOGIN_USER, data);
            return "redirect:http://gulimall.com";
        }

        Map<String, String> errors = Maps.newHashMap();
        errors.put("msg", login.getData("msg", new TypeReference<String>() {
        }));
        redirectAttributes.addFlashAttribute("errors", errors);
        return "redirect:http://auth.gulimall.com/login.html";
    }
}
